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习题练习:Impulse and momentum



 作者: admin发布日期: 2024-08-07 16:03   总分: 17分  得分: _____________

答题人: 匿名未登录  开始时间: 24年08月07日 15:54  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  94.16: A car of mass m, traveling at speed v, stops in time t when maximug5l/fefy,lqxwmhax /pyk.7 1wi9*v h5g :ts2 m braking force is applied. Assuming the brakingi5,95x v *tf7:.ymkh exf alhgpw qw2lsyg/1/ force is independent of mass, what time would be required to stop a car of mass 2m traveling at speed v?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.04: When the velocity of a moving objbvk7. 5d m6gwwect is doubled, its_______is also doubled vkw wm6.5bg7d.

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fnet bb uhev.42:rl$\Delta$tis best related to:

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.05: Which one of the fpu83n3ywb 05tgag, u following choices is most closely associated with the following observatib83n3a uu gwf g0t,p5yon about an isolated object: “The linear momentum of the object is constant.”?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.21: The change in linear momentum of an object is always in the same dire 7non+c/ tw(viction wni(oc+/v 7ntas the

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.08: How long must a 100 N net force act to produce a chbqnz3va*k/ l.j4z2 t dange in momentum of 200 .a k3vlj2qd/t4n b *zzkg.m/s?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.29: P and Q have the :uznl4 w 0pk/lsame momentum. Q can have more kinetic energy than P if wnzkpl4u/ : l0it:

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.26: A ball with a mass ofixsk(5cycf( 8kaj8oe29pfo ) 0.50 kg and a speed of 6.0 m/s collides perpendicularly with a wall and bounces off with a speed of 4.0 m/s in the opposite direction. What is the magnitude of the impulse acting on the bal8cyfefkxkcas)o(85 ipo j92 ( l?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.08: A 50 kilogram gymnast falls freely from a heigj fbb06g+ 9whr;jf o2;windj;ht of 4 meters on to a trampoline. The trampoline then bounces her back upward with a speed equal to the speed at which she first stru jd 2wrwffbo9 nhg+;;ji6;j0 bck the trampoline. What is the average force the trampoline applies on the gymnast?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.27: A 2.0 kg mass moves at 10.0 m/s when it haszh9)a1bmrn x/tx4k b2en x3u8 a collision in space. The mass’s speed was unchanged, but the direction ofe8 /k 3)bxru xzn 192tnab4hxm its velocity was altered by $80^{\circ}$. If the collision lasted 0.25 s, what was the magnitude of the average force exerted on the mass?



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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.13: A bat strikinxk ;eyl olb::79zm 72mlj 7m uvloz(t1g a 0.125 kg-baseball is in contact with the ball for a time of 0.03 seconds. The ball travels in a straight line as it approaches and then leaves the bat. If the ball arrives at the bat with a velocity of 4.5 m/s and leaves with a velocity of-6.5 m/s, what is the magnitude of the average forceojbmlzx 7;zl:2 m7:mv ut97ek1l o (yl acting on the ball?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.43: An object of mass 4.0 g has atotal kinetic energy of 100.0 h asfq e+7 oy,*5;joanJ and an x-component of linear momentum equal to 24.0 kg.m/s. The object is moving in the x-y plane. What is they-component of the o,e 5*qaaoos; +7njhfybject’s linear momentum?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.05: At an instant of time t, a 2nf*utxw9a lg* z3c -xbc1ks9point object of mass M moves with velocity V, has acceleration a, and is at position (x,y). In what direction must the linear c9k*-9xcunw1 2a fxl3bg zts *momentum of the object be directed at this instant?

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.32: A rubber ball of mass 2.0 kg falling straigh ev :tln4n83wzt downward hits the ground witlzn4e8w3t nv:h a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The collision time of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average acceleration (in units of $m/s^{2}$ ) of the ball while it is in contact with the ground?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.33: A rubber ball of mass 2.0 kg falling straight downward hits the groundgyzt7ct 30*h g with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 mgtc t7*3z0g hy/s. The collision time of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average force (in units of Newtons) exerted by the ground on the ball while they are in contact?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  14.12: A box of mass 5.0 kg is being pushed to the right acro8d z )ee:c xwfv+w+0lkss a horizontal surface while a constant frictional force of 8.0 N acts on the bodfzxv:l +kew+8w0e )c x. At some instant of time, the box has a speed of 4.0 m/s and an acceleration of$3.0\; m/s^{2}$ . What is the magnitude of the net force acting on the box at this instant?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.12: A box of mass 12.0 kg is being pushed 1bfx 3b w+ ws9hdhh/c7to the right across a horizontal surface. When the box has 12.0 J of kinetic energy, a 12.0 N / fd+3wxh1bhb7cs h9wnet force acts on it. Which one of the following choices best represents the magnitude of the linear momentum of the box at this instant?

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